There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Can you make four (4) nines (9) equal 100?

Can you spot the hidden girl in the picture below?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

What do you get if you add 2 to 100 four times?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Can you tell a 3D object that has just two surfaces?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?